Has anyone heard of them; they are pretty good, y'know?

http://www.youtube.com/watch?v=Tpv3sxf2eTQ
http://www.youtube.com/watch?v=Ktak27Ge_aI
http://www.youtube.com/watch?v=t57UM9yZ_6E&feature=related
http://www.youtube.com/watch?v=_KzwUVwsch8